Effects of Ectomycorrhizal Fungi on Nutrient Elements of Pinus massoniana Seedlings under Simulated Acid Rain
To evaluate the effects of ectomycorrhizal colonization on nutrient elements of Masson pine (Pinus massoniana) seedlings grown in acidified soils,we grew Masson pine seedlings with Pisolithus tinctorius (ECM) for 210 days in acidified forest soil collected from Chongqing,Southwest China.Three acid levels were set,that is,pH3.5,pH4.5 and pH5.6 (served as the control),and two ectomycorrhizal treatments (inoculated,non-inoculated) were conducted.The results showed that:1) Compared with CK treatment,both acidic treatments decreased soil pH.The pH4.5 treatment had no effect on exchangeable Ca and cation exchangeable capacity (CEC),but increased the content of exchangeable Mg.The pH3.5 treatment significantly reduced exchangeable Ca,Mg and CEC.Inoculation with ECM increased soil pH,exchangeable Ca,Mg and CEC.2) The acid treatments had no effect on soil organic matter and available K,however they significantly reduced the available P and N content in the soil.Inoculation with ECM under pH3.5 treatment increased soil available P and K content than the non-inocultaion treatment.3) Acid rain treatments increased N content of needles,and decreased P,K,Ca,and Mg content of needles.Inoculation with ECM reduced N content of needles,and increased P,K,Ca,and Mg content of needles.4) Acid rain treatments decreased P,K,and Mg content of roots,however inoculation with ECM increased these elements contents,and reduced Al content of roots.These results indicated that inoculation with ECM could effectively alleviate acid rain stress,increase soil buffer capacity to acid rain,decrease Al poison,and increase nutrient absorption capacity and nutrient balance of plants.
ectomycorrhizaesimulated acid rainPinus massoniananutrient element
国家科技期刊平台
NSTL
万方数据
维普
